To make the game fully self-contained, all trade evolutions have been changed. This document details each of these new methods. While the specific documentation is detailed in the patch files, the general principle is that you can evolve trade-based Pokémon by using an evolution item (like a Metal Coat) as a stone, or by reaching a certain level. This eliminates a major barrier to completing the Pokédex.
Move Tutors are now infinite use (usually). The documentation has a specific section for Move Tutors and Egg Moves, which is crucial for building a team that can survive the Elite 4. pokemon sacred gold storm silver documentation top
Go forth, catch a Beldum before the 4th gym, evolve your Scyther with a "Metal Coat" (purchasable in the Goldenrod Dept. Store), and finally defeat Red’s level 88 Pikachu on Mt. Silver. To make the game fully self-contained, all trade
Drayano did not just change where Pokémon appear; he fundamentally redesigned many weaker species to make them viable in competitive-style play. Relying on standard bulbapedia or Serebii pages will cause you to miss massive text overhauls. This eliminates a major barrier to completing the Pokédex
You can check whether a boss monster is holding a Lum Berry to cure status effects or a Focus Sash to survive a one-hit knockout, allowing you to counter with moves like Thief or Knock Off.
Requires specific, often obscure items or events detailed in the Special Event Guide.